An example of this type of drug is heroin, which is usually taken as a shot or is sniffed.

这类毒品的一个例子就是海洛因，它被用来注射或者吸食。

The cells of the serous pericardium secrete and reabsorb the fluid, so usually there's no more than 50 milliliters of fluid in the pericardial cavity at one time - that's about as much as a shot glass.

浆膜心包分泌和吸收液体，心包腔内的液体含量正常不超过50毫升，相当于一小杯酒的液体量。